Airfoil fin for surfboards



FIG. 1 is a perspective view of an airfoil fin for surfboards showing mynew design, the broken lines are for illustrative purposes only and formno part of the claimed design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a left side elevation view thereof, the right side elevationview being a mirror image of that shown;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof.

The ornamental design for an airfoil fin for surfboards, as shown anddescribed.